framework [ˈfreɪmwɜ:k]

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n.参照标准；准则；观点；框架，结构

a supporting structure around which something can be built

It's a bridge of steel framework. 那是座钢铁结构的桥梁。
Physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。